Hi, I've been spending some time the past few weeks implementing p0515r2, i.e. the proposal for consistent comparisons for C++ (aka the spaceship operator). I've received some very valuable help on the IRC channel, but I'm still a little bit stuck. Note, I'm completely new to the GCC codebase and am very much still getting oriented.
Following advice from some of the people in IRC channel I implemented parsing the new token in libcpp and I seem to be successfully parsing it and creating a new AST node. As this feature is not in the C++ standard yet, I wanted to add a command line flag to enable usage of the new operator and ignoring it otherwise. I managed to get cc1plus to accept the parameter, but it seems that when I invoke my own g++ binary with that parameter, it complains about unknown parameters. I'm perfectly happy to dig further on my own, but I get the feeling I'm missing some documentation / resource somewhere that might help me out. Is there some documentation about adding and passing around parameters that will be used both in libcpp and the C++ front-end? What would be the best place to look to learn more about how part of GCC this is structured? I want to make sure I go about this correctly. If this is the wrong place to ask for help, please redirect me, so that I don't unnecessarily spam the wrong mailing list :-). Kind regards, Tim.
